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Ronch [10]
3 years ago
6

To produce a magnetic field, What does an electromagnet require?

Physics
2 answers:
kodGreya [7K]3 years ago
8 0
Selection D makes most sense
AURORKA [14]3 years ago
7 0

Answer:d

Explanation:

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How can the center of gravity of a rigid body be determined?
ipn [44]
To calculate the center of gravity, divide total weight distance moment by total mass of the system. Thus, the center of gravity is 13 meter from left-hand side.
5 0
3 years ago
What are the two most common ways to produce hydrogen gas used in fuel cells?
Natali5045456 [20]

Answer:

Steam-methane reforming

Electrolysis of water

Explanation:

Steam methane reforming involves reaction of methane with water in the presence of a catalyst such as nickel to form Carbon oxides and Hydrogen.

CH4 + H2O ⇌ CO + 3 H

Electrolysis of water involves splitting of water through application of electric current to give Hydrogen and Oxygen gas.

2 H2O(l) → 2 H2(g) + O2(g)

8 0
3 years ago
Which equation can be used to solve for acceleration?<br> t=v/a<br> vf=at-vi<br> a=d/t<br> v=a/t
postnew [5]

Answer:

t=v/a

Explanation:

Acceleration is defined as the rate of change of velocity with time. It is mathematically expressed as;

  Acceleration  = \frac{Final velocity - Initial velocity}{time}  

The change in velocity per unit of time is the acceleration

 From this equation;

      time  = \frac{change in velocity }{acceleration}  

This expression is analogous to the expression chosen.

3 0
3 years ago
A 10,000kg space ship is orbiting the moon with a radius of 25km from the ship to the center of the moon. It's tangential speed
galina1969 [7]

Answer:

False

Explanation:

ac = v^2/r

acceleration is not dependent on the mass of the orbiting object.

3 0
3 years ago
Leash a block of 0.5 kg down the entire length of an inclined plane forming a name of 37 ° with the horizontal. Friction with th
castortr0y [4]
The potential energy of the block is given by:
V = m*g*h
m mass
g = 9.81m/s²
h height

The potential energy of a spring is given by:
V = 0.5 * k * x²

k spring constant
x compression of the spring

If the block starts from rest it has potential energy, but no kinetic energy. As it slides down the incline potential energy is converted into kinetic energy. When the block hits the spring the kinetic energy is converted into spring's potential energy. If the spring is fully compressed and the block is at rest again, the block has transferred all its energy into the spring. No energy is lost. So we can write:

m * g * h = 0.5 * k * x²

m = 0.5 kg
g = 9.81 m/s²
h = 2.5m * sin 37° = 1,5 m
x = 0,6 m

Solve for k.

k = 2 * m * g * h / x² = 40.8 N/m
6 0
3 years ago
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